> my mirror has encountered (on a big site - I don't want 
to 
> start again) a script calendar.php.
> 
> The refering form provides for the next 10 years - and it 
> queries now for each day for the next 10 years.
> Placed all on pause.
> Is there a way to change the filter so such files can be 
> skipped?
Nope - filters can't be changed on-the-fly. Cancel the 
mirror, wait for pending downloads to finish, change the 
filters, and use "Continue an interrupted mirror" feature.